Composite Vessel Seeger Ring and Crystallized Collar
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Solution Overview
Problem
Existing high-pressure vessels experience uncontrollable leakage at the interface between polymer vessels and metal connection pipe fittings due to material incompatibility, leading to pressure instability and potential safety issues.
Innovation Solution
A high-pressure composite vessel design featuring a blow-moulded cylindrical casing with a composite layer reinforced by carbon and aramid fibres, an aluminium reinforcing bottom unit, and a connection pipe fitting with a trapezoidal cross-section seeger ring for enhanced sealing, along with a crystallization process for the collar to improve polymer mechanical properties and a protective layer for dynamic resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a metal connection pipe fitting is sunk in or glued to a polymer liner, then the vessel can be assembled with connection capabilities, but uncontrollable leakage occurs at the interface due to material incompatibility
Solution Approach 1:
An aluminium reinforcing bottom unit with integrated connection pipe fitting serves as an intermediary component between the polymer liner and external piping. The aluminium material provides a compatible interface for metal fittings while the integrated design eliminates separate gluing or sinking operations, ensuring reliable sealing through unified construction.
Solution Approach 2:
The connection pipe fitting is merged with the aluminium reinforcing bottom unit to form an integrated assembly. This combination eliminates the interface between separate polymer and metal components, preventing leakage by creating a unified structural element that maintains integrity under pressure.
2Strength
If the vessel is reinforced with fibrous composite material using winding technique, then strength and pressure resistance are improved, but manufacturing complexity and time increase
Solution Approach 1:
The aluminium reinforcing bottom unit with integrated connection pipe fitting is manufactured and prepared in advance before the winding process. This preliminary preparation of reinforcement elements streamlines the subsequent composite winding operation, reducing overall manufacturing complexity while maintaining high pressure resistance.
3Adaptability or versatility
If a two-piece collar is used to connect the liner and connection pipe fitting, then assembly flexibility is improved, but the number of components and assembly steps increase
Solution Approach 1:
The connection pipe fitting and reinforcing bottom unit are merged into a single integrated aluminium component. This consolidation reduces the number of separate parts while maintaining assembly flexibility, as the integrated design allows for straightforward installation as one unit rather than assembling multiple discrete components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a 100% non-corrosive, lightweight, and highly durable vessel resistant to deformations, high temperatures, and chemicals, ensuring impeccable tightness and stability under pressure, suitable for various applications including emergency services and deep-sea diving.
Implementation Method 1
the collar of the preform undergoes a topical crystallization
Implementation Method 2
this preform is heated to reach a plasticization temperature of a material it is made of
Implementation Method 3
there is a sealing ring made of a material that is characterized by a low Young's (elastic) modulus and a high elongation
Data Source
AI summary
A hight-pressure composite vessel comprising a casing fabricated through blow-moulding a preform of thermoplastic, a connection pipe fitting. In the connection connection pipe fitting (3) with a retaining collar (7), opposite to a sealing groove (9) designed for an o-ring seal, there is a groove (10) for a seeger to mount a non-detachable collar (11a) of the preform (11) by way of the seeger (10a). A method of manufacturing the high-pressure composite vessel under which the casing of the vessel is fabricated of a perform that is blow-moulded so as to obtain the required dimensions thereof, whereas the preform of a thermoplastic material is fabricated using any technology; and the casing of the vessel is connected with the connection pipe fitting, and the external surface of the vessel re reinforced by a special composite layer. The preform (11) first undergoes a process of controlled crystallization and, then, the ring-shaped groove (11b) is made in the collar (11a) of the preform (11).